But, with the German clubs hot favourites to face each other in the Champions League final at Wembley after semi-final first leg wins over Barcelona and Madrid, their rivalry may prevent a move.

Dortmund fans are already up in arms that midfielder Mario Gotze has agreed to join Bayern in the summer after they met a £23m buy-out clause and there is disquiet among the club's hierarchy about the reaction if Lewandowski follows.

Ferguson plans to exploit that to partner Lewandowski with Robin van Persie.

He said: 'The Dortmund fans are not going to be happy by what has happened. I don't think the club will sell Lewandowski to Bayern. I think they'll let his contract run out or sell him elsewhere.

Destructive: Lewandowski was sensational against Real Madrid last week, scoring four times

Destructive: Lewandowski was sensational against Real Madrid last week, scoring four times

'Have I got room for him? I can find room for anybody good.'

Bayern have denied signing an agreement for Lewandowski, whose partnership with current United player Shinji Kagawa was the key to Dortmund winning successive Bundesliga titles before surrendering it to Bayern this season.

Bitter: Mario Gotze is leaving Dortmund for Bayern Munich at the end of the season